Cathodic protection of a high-strength insulated rail joints insulating joints, is in contact with both ends of the rail track placed side insulation, and insulation board clamp groove on both sides of the joint, two enhanced fish plate installed insulation board the groove, then penetration joints with high strength bolts tightened aside from the hole. The first mesh glass cloth insulation board is slotted insulation boards, mainly used in gas transmission pipeline between and gas regulator, metering, storage and other equipment, and its main role is among the various segments of the gas transmission and distribution pipelines, equipment between pipeline insulation and isolation from each other, to protect them against chemical corrosion and prolong the life of piping and equipment. Product complies with SY / T0516-1997 "insulating flange design provides" standard. Where a short section of the inside surface of the ends to be processed in the shape of its teeth match, sealing insulation assembly. After this short section extending end is forging forming, the formation of monolithic joint. The second type of this standard clamp-type insulation joints: clamp-type insulation joints there are two short sections with a flange on the back of which is processed into a beveled flange. Two flange contact surface, sealing and insulating ring achieve through O-rings and insulation. Upper and lower two clamp bolts connecting the flanges are integrally joined, usually by welding the nuts need to exert pressure on the ear piece clamp